#include<bits/stdc++.h>
using namespace std;
long long back_v(long long a, long long b)
{
    long long count1=0,count2=0;
    for(int i=1;i<=a;i++) {
        count1++;
    }
    for(int i=b;i>=1;i--)
        count2++;
    return abs((count1-1)+(count2-1));
}
int main()
{
    long long n,m;
    scanf("%lld%lld", &n, &m);
    printf("%lld", back_v(n,m));
    return 0;
}